Improvement in work-chucking jaws for metal-planers



H. SHERWOOD. Work-Chucking laws for Metal-Planers.

Patented May 19, 1874.

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HIRAM SHERWOOD, OF WDROESTER, MASSAOHUSETTS. V

Specification forming part of Letters Patent No. 150,980, dated May 19, 1874; application filed April 14, 1874.

To all whom it may concern:

Be it known that I, HIRAM SHERWOOD, of the city and county of Worcester and State of Massachusetts, have invented a certain new and useful Work-Ghucking Jaw for use upon the Bed of Metal-Planers; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, whichform a part of this specification, and in which- Figure 1 represents a side view of my improved work-chucking jaw. Fig. 2 represents a plan view of the same. Fig. 3 represents a vertical section at line X X, Fig. 2; and Fig. 4 represents a plan view of a portion of a planerbed, illustrating the manner of using my workchucking jaw.

It has heretofore been the general practice, when securing work in position upon the bed of metallaners, to use straps, bars, or blocks of metal, extending over portions of the work and bolted down to the bed, or by wedging portions of the work between pins or chocks set into the openings of the bed--these for large work; and, for small work, speciallydevised chucks or Vises, placed above the planer bed, as an auxiliary bed or support. These latter, although adapted for small work of various kinds, are not intended, and are not suitable, for all classes of work, or for work which is supported directly upon the planerbed, while the former method is, at best, crude and inconvenient, and often requires the expenditure of much time and labor to contrive and arrange the straps and bolts so as to hold the work and not interfere with the action of the machine.

To obviate the above objections, and to provide a work-chucking jaw at once cheap, effective, and convenient, and adapted for use upon all parts of the bed, and with large or small work, is the object of my present invention; and to that end my invention consists in an independent chucking-jaw of the improved construction hereinafter described.

In the drawings, the parts marked A represent the body, which is provided with a rib, a, to fit the groove of the planer-bed B, and is arranged for being secured in any desired position by means of the holdingb-olt G. D indicates a movable clamping'piece, arranged to slide in the interior of the body A, and fitted thereto by dovetailed or other shaped guiding-sides (1 cl. E E indicate chuckingscrews, arranged through the rear part of the body A, with their ends resting against the rear part of the clamping-piece D. F indicates a quill or ferrule, placed around the holding-bolt G to prevent the top plate A of the body from being forced down upon the clamping-piece D when the nut c is turned down.

The work to be secured is placed upon the 7 bed of the planer in the desired position. Two or more of the jaws, as required, or jaws and chocking-blocks, are then attached to the bed at the most convenient positions near the work, and the work is firmly fastened in position on the bed by turning in the chuckingscrews E, and forcing the faces of the clamping-pieces D against the sides of the piece to be held in position. The work can also be adjusted to the exact desired position by simply tightening and loosening the screws of the jaws at opposite sides of the piece.

By the use of my improved independent chuckingjaws long pieces of work, such as shafting, can be quickly secured and adjusted upon the planer-bed for the purpose of cutting spline grooves, and similar operations; and while the piece is securely held from moving or springing, its entire upper surface is left free and open, so that the cutter can traverse the entire length of the piece at a single out. These jaws are equally applicable for securing nearly all other kinds of work, whether small or large pieces, and thus save the inconvenience of lifting a cumbersome chuck onto and off from the bed when changing the work, or of keeping a box full of straps, blockings, and bolts, from which to select such as may be required by the old method.

My improved jaw is light, strong, and durable, and can-be manufactured at comparatively slight cost; and, while adding much to ,the convenience and facility of securing the work to the planer-bed, its use saves much valuable time and labor in adjusting and scribed, consisting of the body A, clampingpieee D, ehuekingscrews E, and holding-bolt 0, when constructed and adapted for use directly upon the planer-bed, substantially as herein set forth.

HIRAM SHERWOOD.

Witnesses:

OHAs. H. BURLEIGH, L. G. PRATT. 

